API CollectionSetAlgebra ImplementationsNot available in Objective-C.Not available in Python.TopicsInitializersinit(_:)init(arrayLiteral:)Instance PropertiesisEmptyInstance MethodsisDisjoint(with:)isStrictSubset(of:)isStrictSuperset(of:)isSubset(of:)isSuperset(of:)subtract(_:)subtracting(_:)